STIGQter: STIG Summary: IBM z/OS ACF2 Security Technical Implementation Guide Version: 8 Release: 2 Benchmark Date: 23 Apr 2021:

CA-ACF2 must properly define users that have access to the CONSOLE resource in the TSOAUTH resource class.

DISA Rule

SV-223431r533198_rule

Vulnerability Number

V-223431

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

ACF2-ES-000100

Severity

CAT II

CCI(s)

• CCI-000213 - The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Weight

10

Fix Recommendation

Configuration should ensure that all users that have access to the CONSOLE resource in the TSOAUTH resource class are properly defined.

Ensure the CONSOLE resource is not defined to the TSOAUTH resource class.

Example:
$KEY(CONSOLE) TYPE(TSO)
- UID(*) PREVENT

At the discretion of the ISSO, users may be allowed to issue z/OS system commands from a TSO session. With this in mind, ensure the following items are in effect for users granted the CONSOLE resource in the TSOAUTH resource class or users assigned the CONSOLE attribute:

Logonids are restricted to the INFO level on the AUTH field specified in the OPERPARM segment of the user profile record.

Logonids are restricted to READ access to the MVS.MCSOPER.userid resource defined in the OPERCMDS resource class (i.e., resource rules for TYPE(OPR)).

Example:
$KEY(MVS) TYPE(OPR)
MCSOPER.logonid UID(sysprgmr) SERVICE(READ) ALLOW

COMPILE ' ACF2.MVA.OPR(MVS)' STORE

F ACF2,REBUILD(OPR)

Check Contents

NOTE: If CLASMAP defines TSOAUTH or OPERCMDS as anything other than the default of TYPE(TSO) or TYPE(OPR), replace TSO or OPR below with the appropriate three letters.

If the CONSOLE resource is not defined to the TSOAUTH resource class, this is not a finding.

At the discretion of the ISSO, users may be allowed to issue z/OS system commands from a TSO session. With this in mind, configure the following for users granted the CONSOLE resource in the TSOAUTH resource class or users assigned the CONSOLE attribute:

Logonids are restricted to the INFO level on the AUTH field specified in the OPERPARM segment of the user profile record.
Logonids are restricted to READ access to the MVS.MCSOPER.userid resource defined in the OPERCMDS resource class (i.e., resource rules for TYPE(OPR)).

If all of the above are true, this is not a finding.

If any of the above are untrue, this is a finding.

Vulnerability Number

V-223431

Documentable

False

Rule Version

ACF2-ES-000100

Severity Override Guidance

NOTE: If CLASMAP defines TSOAUTH or OPERCMDS as anything other than the default of TYPE(TSO) or TYPE(OPR), replace TSO or OPR below with the appropriate three letters.

If the CONSOLE resource is not defined to the TSOAUTH resource class, this is not a finding.

At the discretion of the ISSO, users may be allowed to issue z/OS system commands from a TSO session. With this in mind, configure the following for users granted the CONSOLE resource in the TSOAUTH resource class or users assigned the CONSOLE attribute:

Logonids are restricted to the INFO level on the AUTH field specified in the OPERPARM segment of the user profile record.
Logonids are restricted to READ access to the MVS.MCSOPER.userid resource defined in the OPERCMDS resource class (i.e., resource rules for TYPE(OPR)).

If all of the above are true, this is not a finding.

If any of the above are untrue, this is a finding.

Check Content Reference

M

Target Key

4100

Comments